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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
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	// alert(history.length)
	setTimeout(function(){
		// history.back();//返回上一页，相当于点了一下后退按钮
		history.go(-2);
	},3000)
	
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</head>

<body>
	<h2>页面访问出错啦！3秒后跳转回上一页！</h2>
	<h1>这是5.html，哈哈，后面没啦</h1>

</body>
</html>
